82 results about "Common noise" patented technology

A method for locating gas leaks from underground gas pipelines in which a first acoustic sensor having a first signal output is positioned in ground disposed substantially above or at a distance from the underground gas pipeline. At least one second acoustic sensor having a second signal output is positioned in the ground at a plurality of locations substantially above the underground gas pipeline. The output signals from the acoustic sensors are measured for each location of the second acoustic sensor and the signals are adaptively filtered to remove common noise signal components. The statistical minima of these rms voltages are determined for both the first output signal and the adaptively filtered second output signals and the differences determined. The location of the second acoustic sensor corresponding to the largest positive said difference is the location closest to the leak site.

An organic light emitting display comprises: a display panel with a plurality of pixels connected to data lines and sensing lines, each pixel comprising an OLED and a driving TFT for controlling the amount of light emission of the OLED; and a data driver IC comprising a plurality of sensing units for sensing current data of the pixels through a plurality of sensing channels connected to the sensing lines, each sensing unit comprising: a first current integrator connected to an odd sensing channel; a second current integrator connected to an even sensing channel neighboring the odd sensing channel; and a sample & hold unit that removes common noise components from a first sampled value input from the first current integrator and a second sampled value input from the second current integrator while storing and holding the first and second sampled values.

An organic light emitting diode display is disclosed. The organic light emitting diode display includes a display panel including a plurality of pixels, a plurality of sensing units configured to integrate current information of the pixels through a plurality of sensing channels connected to sensing lines of the display panel and output a first sensing value, a reference sensing unit configured to integrate previously set reference current information and output a reference sensing value, a calculation block configured to calculate the first sensing value and the reference sensing value, remove a common noise component from the first sensing value, and output a second sensing value, and an analog-to-digital converter configured to convert the second sensing value into a digital sensing value.

Provided are a method of removing common noise and a method of detecting touch information. The method of removing common noise includes acquiring base lines, acquiring raw data, calculating touch strengths (TSs) using the base lines and the raw data, calculating a difference representative value between the TSs and a reference level, and removing influence of common noise from the TSs using the difference representative value.

The invention discloses a self-adaptive multi-scale image weak edge detection method based on the minimum description length (MDL) principle. The self-adaptive multi-scale image weak edge detection method based on the minimum description length principle comprises the steps that firstly, a linear scale space is constructed by means of multi-scale Gaussian smoothing, then the local description length of an image is calculated and the optimum local smoothness scale is determined by means of the minimum description length principle, and finally edge detection is carried out on the image treated with local smoothing to obtain all edges of the weak edge image. The self-adaptive multi-scale image weak edge detection method based on the minimum description length principle has the advantages that common noise can be filtered effectively, a real weak edge can be extracted, and the phenomena of edge fracture, edge deviation, false edge responses and the like can be avoided; in addition, the algorithm used in the method is a non-iterative filter method, the computing speed is greatly improved, and the stability of the algorithm is greatly improved.

The sensing method for an organic light-emitting display comprises: defining a pixel group comprising a reference pixel and two or more valid pixels, among a plurality of pixels arranged on a horizontal line; obtaining a black level current sensing value by applying a black level data voltage to the reference pixel; obtaining a current sensing value for a given gray level by applying a data voltage for the given gray level higher than the black level to each of the valid pixels; and obtaining a pixel current sensing value by subtracting the black level current sensing value from the current sensing value for the given gray level to eliminate common noise.

Disclosed herein is a touch sensing apparatus capable of supporting hover sensing, including: a plurality of capacitance-voltage converters (C-V converters) outputting different voltage values depending on a change in capacitance of each of the sensing electrodes; a plurality of integrators integrating output voltages of each of the C-V converters; a first multiplexer multiplexing outputs of the plurality of integrators; a second multiplexer multiplexing the outputs of the plurality of integrators; a first differential amplification unit for touch sensing receiving an output of the first multiplexer and an output of the second multiplexer; a second differential amplification unit for hover sensing receiving the output of the first multiplexer and the output of the second multiplexer; and a control unit sensing a touch event or a hover event, thereby removing a common noise to accurately sense both the touch event and the hover event.

An image pickup apparatus includes: a first sound-collection unit that detects an ambient sound and outputs first sound information; a second sound-collection unit other than the first sound-collection unit that detects the sound and outputs second sound information; and a signal processing unit that generates a sound signal corresponding to the sound by eliminating a common noise signal included in the first sound information and the second sound information based on the first sound information and the second sound information.

The invention discloses a noise interference-proof high-side gate drive circuit. The circuit mainly comprises a common mode noise interference-proof high-voltage level displacement circuit, a pulse filtering circuit, an RS trigger and an output drive stage circuit, wherein the low-side low-voltage pulse generating signals are converted into high-side high-voltage pulse generating signals through the common mode noise interference-proof high-voltage level displacement circuit which can eliminate the common mode noise in the application at the same time; the pulse filtering circuit is used for filtering the residual differential mode noise component, the pulse signals for normal working are only maintained and returned to normal signals through the RS trigger; and then the normal signals are output as square signals through the output drive stage circuit to drive an external high-side power tube.

A computer-implemented system and a method for pruning a library of bi-phrases, suitable for use in a machine translation system are provided. The method includes partitioning a bi-phrase library into a set of sub-libraries. The sub-libraries may be of different complexity such that, when pruning bi-phrases from the plurality of sub-libraries is based on a common noise threshold, a complexity of bi-phrases is taken into account in pruning the bi-phrases.

The invention discloses a sensor sensing based AMOLED (active matrix organic light emitting diode) touch display screen. The touch display screen mainly comprises a touch sensor and a differential signal processing circuit, the touch sensor comprises a Dummy sensor and Touch sensors, the differential signal processing circuit samples capacitance of the Dummy sensor and the Touch sensors and measures in a differential mode so as to eliminate common noise of two channels. By the AMOLED touch display screen, the touch sensor can determine touch coordinates accurately, and accordingly touch sensing performance is improved.

A vehicular power supply circuit for supplying power to loads from a battery to drive the loads includes a power line and noise protection circuits. The power line is connected to the loads and systematically separated into multiple power lines based on characteristics of the loads to be connected. Each noise protection circuit is provided to a corresponding power line on the upstream side of the loads connected to the corresponding power line to serve as a common noise protection circuit for the loads connected to the corresponding power line.

A voice mixing device for mixing a plurality of voice signals, comprises: a speaker selection unit selecting at least one voice signal among said plurality of voice signals; a full signal adder unit adding all of at least one voice signal selected by said speaker selection unit; respective subtractor unit subtracting only one of said selected voice signals from an addition result of said full signal adder unit; a common noise suppression unit suppressing noise of a common voice signal, being an addition result of said full signal adder unit; individual noise suppression unit suppressing noise of respective individual voice signals, being subtraction results of said subtractor unit; and memory switching unit copying information of noise suppression obtained in said common noise suppression unit based on a selection result of said speaker selection unit, to information of noise suppression in said individual noise suppression unit.

A new and useful circuitry for DC to AC single stage conversion are presented, with the advantages of bi-directionality, resonant power transfer, high efficiency and simplicity. The output voltage dual polarity is achieved by means of control, synchronizing the output switch with one or the other of the primary switches. The invention also provides the means of canceling the common noise of the magnetic transformer.

The invention discloses active carbon noise-absorbing cotton which is composed of a top surface layer, a back surface layer and a cellocotton layer clamped between the top surface layer and the back surface layer, wherein the top surface layer and the back surface layer are made of a non-woven fabric material. The anti-aging active carbon noise-absorbing cotton is characterized in that the non-woven fabric is prepared from the following raw materials in parts by weight through a melt-blowing method: 100 parts of isotactic polypropylene, 4-5 parts of ferroferric oxide, 2-3 parts of MnO2, 10-12 parts of E-12 epoxide resin, 12-15 parts of epoxy butyl oleate, 1-2 parts of antioxidant 1010, 6-9 parts of active carbon powder, 2-3 parts of peach gum, 12-14 parts of straw, 4-5 parts of rhizoma gastrodiae, 2-3 parts of broom cypress fruit, 1-2 parts of selfheal spike and 4-5 parts of accessory ingredient. The preparation method is simple and cost-saving; the prepared product is large in void volume, better in weather resistance and air permeability and good in oxygen permeability; the noise-absorbing effect of common noise-absorbing cotton is improved.

The present invention provides a pulse noise filtering method for load switch event detection which is used to solve the problem that a common noise elimination device cannot effectively filter noisewith non-stationary and non-Gaussian features in the prior art. The power signal noise filtering method comprises the steps of: inputting actually measured power signals; performing segmentation on the actually measured power signals and rearranging data to a matrix; transforming the power signal matrix; performing matrix initialization prior to iteration; and performing iteration calculation on the matrix after the initialization is completed to obtain a matrix after pulse noise is filtered, and further converting the matrix to the power signals. Through transformation for the power signal matrix, the sparsity of the power signals is processed to effectively filter the pulse noise in the power signals and achieve high fidelity for the useful power signals, the phase step features of the power signals cannot be damaged, the method is simple and practicable, the computing speed is fast, and therefore, the accurate switch event detection can be performed to perform accurate decompositionfor domestic electricity load.

The invention provides a method for producing a low-noise biaxially-oriented polypropylene (BOPP) pressure sensitive adhesive tape with a paper core with the inner diameter of 25.4mm. A slitting technology for an adhesive tape with the paper core with the inner diameter of 25.4mm is realized; low-noise effect treatment is realized on the basis of slitting of the adhesive tape with the paper core with the inner diameter of 25.4mm; and problems that the inner diameter of a paper core of a low-noise BOPP pressure sensitive adhesive tape cannot be 25.4mm, and the noise of an adhesive tape with a paper core with the inner diameter of 25.4mm cannot be low are solved. By the produced low-noise BOPP pressure sensitive adhesive tape with the paper core with the inner diameter of 25.4mm, conveying space can be effectively saved, and the conveying efficiency is improved; and moreover, the low-noise BOPP pressure sensitive adhesive tape is different from a common-noise adhesive tape with a paper core with the inner diameter of 25.4mm, and has a low-noise effect, the noise of the low-noise BOPP pressure sensitive adhesive tape can be below 30 decibels, and the BOPP pressure sensitive adhesive tape is an environment-friendly BOPP adhesive tape.